How to overload controller method in MVC?

Question

I'm trying to overload the method below because I don't want to pass a null for the optional parameter. So I read online that I could let overloads call each other. I was following this example:

Is passing null in to a method acceptable

[HttpGet]
    public ActionResult TesMethod (int? testID, int employeeID)
    {
        Excel excel = new Excel();
        excel.CreateExport(null, int employeeID);
        return RedirectToAction("Index", "Employee");
    }

[HttpGet]
    public ActionResult TesMethod (int employeeID)
    {
        Excel excel = new Excel();
        excel.CreateExport(int employeeID);
        return RedirectToAction("Index", "Employee");
    }

I would like one method to take the optional parameter int? testID and the other method to not take the optional parameter. How can I do this?

Any help is very much appreciated it.

why so difficult? You can have one method that takes employeeID and another that takes testID and employeeID ... I don't see any reason of having optional parameter — demo
– demo, Commented Mar 4, 2019 at 18:04
Possible duplicate of Can you overload controller methods in ASP.NET MVC? — Peter B
– Peter B, Commented Mar 4, 2019 at 18:09
@PeterB That's only a duplicate if you take this question literally instead of showing the OP what should be done — Camilo Terevinto
– Camilo Terevinto, Commented Mar 4, 2019 at 18:10
By the way, this code doesn't compile: excel.CreateExport(int employeeID); — Camilo Terevinto
– Camilo Terevinto, Commented Mar 4, 2019 at 18:11

reZach · Accepted Answer · 2019-03-04 18:12:26Z

4

If you don't want to pass null, default to null instead. Following the below structure, you can pass in an employeeID and a testID if needed. You only need this method (and not two).

[HttpGet]
public ActionResult TesMethod (int employeeID, int? testID = null)
{
    Excel excel = new Excel();
    excel.CreateExport(testID, employeeID);
    return RedirectToAction("Index", "Employee");
}

edited Mar 4, 2019 at 18:12

answered Mar 4, 2019 at 18:07

reZach

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